Investigation On Radially Polarized Vectorial Optical Field For Quantum Manipulation

Vectorial optical fields are the kind of optical fields that have different polarize states at different position on the wave front, radially polarized beam and angularly polarized beam are two of the most interested topic in the vectorial optical research. The vectorial optical fields have unique physical properties, such as tighter focus spots under high numerical, and there is a strong longitudinal component at the focal region, meanwhile the transversal component has a ring-shaped distribution, which could been utilized in "optical tweezers", and manipulate small particles. Vectorial optical fields have broad utility in holographic optics and quantum communication, and manipulation of quantum system. Vectorial optical fields have drawn an increasing amount of interest in the past few years And numerous methods of generation, application and mathematical description was been proposed.In this paper, we demonstrated the development and prospect of vectorial optical fields, summarized the main generational methods and states quo both domestic and abroad. The focal property of radially polarized beam has been discussed, and both the transversal and longitudinal component of the focal region has been obtained. We figured out that under what circumstance, the longitudinal components reach its maximum. A special wave plate has been simulated, results shown that this wave plates could transform uniformly polarized beam of certain wavelength into cylindrical vector beam, by turning the angular of the wave plate, could generate different cylindrical vector beam. In this paper a radially polarized beam has been generated by a set of rotators, and several experiment have been performed to acquire the electric component distributions using computer controlled CCD.And the Stokes vector and the polarization orientation distribution have been calculated, in the purpose of building a database for the further analysis. The phase distribution of the beam has been obtained by M-Z interference experiment. In the concern of the longitudinal component at the focal region after a high numerical aperture focus, the parameters to evaluate the radially polarized beam, such as amplitude uniformity and polarization orientation deviancy have been proposed, applied and calculated based on the beam database. Based on these investigations, the vector spatial structure of the radially polarized beam has been reconstructed and visualized.